Abs or cardio?kinda confused?

im a 17 year old boy,like 1.76 meters, 63 kgs,i just have a lil lower ab fat,i started doing a good abs training(the pion4profession),just doing it for like a week,i feel that my abs r stronger but does it burn my lower fat?and if i do cardio will i lose weight?cuz i dont wanna lose alot of weight just lose the belly..i dont have fat in other places just neglected the abs...im usually doing only push ups n arm exercises